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Goryan [66]
3 years ago
12

Which statements best describe the work of Marie and Pierre Curie? Check all that apply.

Physics
2 answers:
morpeh [17]3 years ago
8 0

Answer:

They came up with the term “radioactivity.”

They conducted experiments with uranium-containing minerals and pure uranium.

They discovered two new radioactive elements.

Explanation:

As we know that the radioactivity is discovered by Marie and Curie and as per the experimental verification of the theory given by them we can say that rate of decay of a radioactive sample is directly proportional to the number of the radioactive same present at that time.

So it is given as

\frac{dN}{dt} = -\lambda N

so here they also discovered two new radioactive substance apart from all the experiments related to the Uranium

AleksAgata [21]3 years ago
4 0

B. They came up with the term “radioactivity.”

C. They conducted experiments with uranium-containing minerals and pure uranium.

E. They discovered two new radioactive elements

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Helen [10]

Answer:

15 protons and 18 electrons

General Formulas and Concepts:

<u>Chemistry</u>

  • Reading a Periodic Table
  • Element Number
  • Neutral Atoms
  • Ions

Explanation:

We are given the element P. P is 15 on the Periodic Table, meaning it has 15 protons and 15 electrons (all elements are in neutral form).

P³⁻ ion means the element now has a negative charge of 3. We know protons have a positive charge and electrons have a negative charge. 3- means we will have more electrons than protons.

Therefore, P³⁻ would have 15 protons and <em>18</em> electrons:

15 (+) + 18 (-) = 3 (-)

7 0
3 years ago
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a 1.2 kg rocket is launched from ground level with initial velocity of 12 m/s. What is the maximum height the rocket can reach?
Tanzania [10]

As the rocket is launched from the ground its height will go on increasing till it stops

So the height of rocket will be maximum when its speed becomes zero

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PE = KE

mgH = \frac{1}{2}mv^2

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5 0
2 years ago
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zimovet [89]

Answer:

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scientific inquiry. Scientific inquiry encompasses the many methods through which scientists investigate the nature of reality and provide interpretations based on the data gathered.

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The airplanes acceleration is 2.1875
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The stone in the accompanying figure can be carried from the bottom to the top of a cliff by various paths. Which path requires m
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